To ensure someone can be effectively supported throughout the internship, we can only look to hire an intern in either Singapore or in Europe. You’ll work remotely within our Middle-end / Tooling team, focusing on improving the observability of Dune, the OCaml build system. This isn't about cosmetic changes; it’s about digging into Dune’s core to expose how it builds things, making complex OCaml projects more understandable. Responsibilities Dive into the Dune codebase, identify areas where the build rules are translated into actions. Implement modifications directly in Dune’s source code to expose fine-grained information about builds. Develop and contribute pull requests to the upstream ocaml/dune project, working with the maintainers. Experiment with your changes and new tooling on real, large-scale industrial OCaml codebases to validate their usefulness. Collaborate asynchronously with the team. Requirements Must have: Solid OCaml programming skills. You need to be comfortable reading, understanding, and writing idiomatic OCaml. Experience with basic Git and GitHub workflows (branching, committing, pull requests, code reviews). Good written and verbal English communication skills for collaborating with a remote, async team and upstream maintainers. Nice to have: Prior experience using more than one build system (e.g., Cargo, Make, Bazel, SCons, Nix, etc.). What Success Looks Like You’ve made significant contributions to Dune, resulting in working prototypes or even merged changes for a tool that clarifies what happened during a build and why. This could involve exposing new internal Dune data structures or developing a basic analysis tool on top, verified on an industrial codebase. Hiring Process Hear from our recruiter about how we hire engineers. Simply apply for the relevant role on our careers site. Recruiter screen Speak with our recruiter to find out more about Ahrefs, our teams, culture, and get some hints on the process ahead. Take home task The nature of the task depends on the role you’re applying for — the recruiter will guide you through it. We don’t really set strict deadlines or make the tasks too arbitrary. We try to make them fun! Interview These are fairly unstructured technical discussions — a chance for us to learn more about you, and for you to learn more about our teams and work. There’s no LeetCode, coding puzzles, or whiteboard exercises. Relax, the pressure’s off! No more interviews, no more tasks. Just look forward to joining the team! #J-18808-Ljbffr
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